How to make cheeks look sunken?

You need a matte bronzer. "Matte" just means - a powder with no shimmer in it. You also need it to be 2-3 shades darker than the person's actual skin tone. You have to make them do a fish face or kissy face, then take a bronzer brush, rub the brush in the bronzer a little bit (JUST A LITTLE) and sweep it in the dent that is created under the person's cheekbone. You can gradually build it to make it look more noticeable. Also, if a person bites the sides of their cheek a little bit, your cheeks naturally look sunken in.